--- loncom/xml/lonxml.pm 2004/02/06 20:59:50 1.301
+++ loncom/xml/lonxml.pm 2004/07/27 23:35:34 1.333
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# XML Parser Module
#
-# $Id: lonxml.pm,v 1.301 2004/02/06 20:59:50 sakharuk Exp $
+# $Id: lonxml.pm,v 1.333 2004/07/27 23:35:34 www Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -36,30 +36,11 @@
# The C source of the Code may not be distributed by the Licensee
# to any other parties under any circumstances.
#
-# last modified 06/26/00 by Alexander Sakharuk
-# 11/6 Gerd Kortemeyer
-# 6/1/1 Gerd Kortemeyer
-# 2/21,3/13 Guy
-# 3/29,5/4 Gerd Kortemeyer
-# 5/26 Gerd Kortemeyer
-# 5/27 H. K. Ng
-# 6/2,6/3,6/8,6/9 Gerd Kortemeyer
-# 6/12,6/13 H. K. Ng
-# 6/16 Gerd Kortemeyer
-# 7/27 H. K. Ng
-# 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
-# Guy Albertelli
-# 9/26 Gerd Kortemeyer
-# Dec Guy Albertelli
-# YEAR=2002
-# 1/1 Gerd Kortemeyer
-# 1/2 Matthew Hall
-# 1/3 Gerd Kortemeyer
-#
+
package Apache::lonxml;
use vars
-qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
+qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
use strict;
use HTML::LCParser();
use HTML::TreeBuilder();
@@ -141,9 +122,6 @@ $evaluate = 1;
# stores the list of active tag namespaces
@namespace=();
-# if 0 all high ASCII characters will be encoded into HTML Entities
-$prevent_entity_encode=0;
-
# has the dynamic menu been updated to know about this resource
$Apache::lonxml::registered=0;
@@ -172,6 +150,7 @@ $Apache::lonxml::warnings_error_header='
sub xmlbegin {
my $output='';
+ @htmlareafields=();
if ($ENV{'browser.mathml'}) {
$output=''
.''
@@ -401,23 +380,28 @@ sub latex_special_symbols {
my ($string,$where)=@_;
if ($where eq 'header') {
$string =~ s/(\\|_|\^)/ /g;
- $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
+ $string =~ s/(\$|%|\{|\})/\\$1/g;
$string =~ s/_/ /g;
+ $string=&Apache::lonprintout::character_chart($string);
+ # any & or # leftover should be safe to just escape
+ $string=~s/([^\\])\&/$1\\\&/g;
+ $string=~s/([^\\])\#/$1\\\#/g;
} else {
- $string=~s/\\ /\\char92 /g;
- $string=~s/\^/\\\^\\strut /g;
- $string=~s/\~/\\char126 /g;
- #fixup & if it doesn't look like
- # { or α
- $string=~s/(&(?!((\#[0-9]+)|([a-z]+));))/\\$1/gi;
- $string=~s/([^&])\#/$1\\#/g;
- $string=~s/([^\\])\#/$1\\#/g;
- $string=~s/(\$|_|{|})/\\$1/g;
- $string=~s/\\char92 /\\texttt{\\char92}/g;
- $string=~s/(>|<)/\$$1\$/g; #more or less
- if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
- if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
- if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
+ $string=~s/\\/\\ensuremath{\\backslash}/g;
+ $string=~s/([^\\]|^)\%/$1\\\%/g;
+ $string=~s/([^\\]|^)\$/$1\\\$/g;
+ $string=~s/([^\\])\_/$1\\_/g;
+ $string=~s/\$\$/\$\\\$/g;
+ $string=~s/\_\_/\_\\\_/g;
+ $string=~s/\#\#/\#\\\#/g;
+ $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
+ $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
+ $string=&Apache::lonprintout::character_chart($string);
+ # any & or # leftover should be safe to just escape
+ $string=~s/([^\\]|^)\&/$1\\\&/g;
+ $string=~s/([^\\]|^)\#/$1\\\#/g;
+ $string=~s/\|/\$\\mid\$/g;
+#single { or } How to escape?
}
return $string;
}
@@ -480,7 +464,7 @@ sub inner_xmlparse {
#clear out any tags that didn't end
while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
my $lasttag=$$stack[-1];
- if ($token->[1] =~ /^$lasttag$/i) {
+ if ($token->[1] =~ /^\Q$lasttag\E$/i) {
&Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
last;
} else {
@@ -515,10 +499,6 @@ sub inner_xmlparse {
}
}
- # Encode any high ASCII characters
-# if (!$Apache::lonxml::prevent_entity_encode) {
-# $result=&HTML::Entities::encode($result,"\200-\377");
-# }
if ($Apache::lonxml::redirection) {
$Apache::lonxml::outputstack['-1'] .= $result;
} else {
@@ -548,6 +528,10 @@ sub inner_xmlparse {
return $finaloutput;
}
+##
+## Looks to see if there is a subroutine defined for this tag. If so, call it,
+## otherwise do not call it as we do not know what it is.
+##
sub callsub {
my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $currentstring='';
@@ -580,6 +564,10 @@ sub callsub {
$parstack,$parser,$safeeval,
$style);
} else {
+ if ($target eq 'tex') {
+ # throw away tag name
+ return '';
+ }
#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
if ($metamode <1) {
if (defined($token->[4]) && ($metamode < 1)) {
@@ -620,6 +608,7 @@ sub setup_globals {
my ($request,$target)=@_;
$Apache::lonxml::request=$request;
$Apache::lonxml::registered = 0;
+ @Apache::lonxml::htmlareafields=();
$errorcount=0;
$warningcount=0;
$Apache::lonxml::default_homework_loaded=0;
@@ -678,7 +667,9 @@ sub init_safespace {
$safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
$safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
$safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
-
+ $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
+ '&chem_standard_order');
+
$safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
$safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
$safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
@@ -750,16 +741,21 @@ sub init_safespace {
$safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
$safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
$safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
+ $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
+ $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
+ $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
#need to inspect this class of ops
# $safeeval->deny(":base_orig");
+ $safeeval->permit("require");
$safeinit .= ';$external::target="'.$target.'";';
my $rndseed;
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
$rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
- $safeinit .= ';$external::randomseed='.$rndseed.';';
+ $safeinit .= ';$external::randomseed="'.$rndseed.'";';
&Apache::lonxml::debug("Setting rndseed to $rndseed");
&Apache::run::run($safeinit,$safeeval);
+
}
sub default_homework_load {
@@ -774,18 +770,26 @@ sub default_homework_load {
}
}
+my $metamode_was;
sub startredirection {
- $Apache::lonxml::redirection++;
- push (@Apache::lonxml::outputstack, '');
+ if (!$Apache::lonxml::redirection) {
+ $metamode_was=$Apache::lonxml::metamode;
+ }
+ $Apache::lonxml::metamode=0;
+ $Apache::lonxml::redirection++;
+ push (@Apache::lonxml::outputstack, '');
}
sub endredirection {
- if (!$Apache::lonxml::redirection) {
- &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
- return '';
- }
- $Apache::lonxml::redirection--;
- pop @Apache::lonxml::outputstack;
+ if (!$Apache::lonxml::redirection) {
+ &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
+ return '';
+ }
+ $Apache::lonxml::redirection--;
+ if (!$Apache::lonxml::redirection) {
+ $Apache::lonxml::metamode=$metamode_was;
+ }
+ pop @Apache::lonxml::outputstack;
}
sub end_tag {
@@ -831,30 +835,30 @@ sub decreasedepth {
sub get_all_text_unbalanced {
#there is a copy of this in lonpublisher.pm
- my($tag,$pars)= @_;
- my $token;
- my $result='';
- $tag='<'.$tag.'>';
- while ($token = $$pars[-1]->get_token) {
- if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
- $result.=$token->[1];
- } elsif ($token->[0] eq 'PI') {
- $result.=$token->[2];
- } elsif ($token->[0] eq 'S') {
- $result.=$token->[4];
- } elsif ($token->[0] eq 'E') {
- $result.=$token->[2];
- }
- if ($result =~ /(.*)\Q$tag\E(.*)/s) {
- &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
- &Apache::lonxml::debug('Result is :'.$1);
- $result=$1;
- my $redo=$tag.$2;
- &Apache::lonxml::newparser($pars,\$redo);
- last;
- }
- }
- return $result
+ my($tag,$pars)= @_;
+ my $token;
+ my $result='';
+ $tag='<'.$tag.'>';
+ while ($token = $$pars[-1]->get_token) {
+ if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+ $result.=$token->[1];
+ } elsif ($token->[0] eq 'PI') {
+ $result.=$token->[2];
+ } elsif ($token->[0] eq 'S') {
+ $result.=$token->[4];
+ } elsif ($token->[0] eq 'E') {
+ $result.=$token->[2];
+ }
+ if ($result =~ /\Q$tag\E/is) {
+ ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
+ #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
+ #&Apache::lonxml::debug('Result is :'.$1);
+ $redo=$tag.$redo;
+ &Apache::lonxml::newparser($pars,\$redo);
+ last;
+ }
+ }
+ return $result
}
sub increment_counter {
@@ -907,12 +911,12 @@ sub get_all_text {
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
- if ($token->[1] =~ /^$tag$/i) { $depth++; }
- if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
- if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
+ if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
+ if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
+ if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
$result.=$token->[4];
} elsif ($token->[0] eq 'E') {
- if ( $token->[1] =~ /^$tag$/i) { $depth--; }
+ if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
#skip sending back the last end tag
if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
my $string=
@@ -941,7 +945,7 @@ sub get_all_text {
#never found the end tag ran out of text, throw error send back blank
&error('Never found end tag for <'.$tag.
'> current string